Add ui/display, message_center, webview to GN build.

ui/display/display.gyp

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
+      # GN version: //ui/display/types
       'target_name': 'display_types',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../ui/gfx/gfx.gyp:gfx_geometry',
       ],
       'defines': [
         'DISPLAY_TYPES_IMPLEMENTATION',
       ],
       'sources': [
+        # Note: file list duplicated in GN build.
         'types/chromeos/display_mode.cc',
         'types/chromeos/display_mode.h',
         'types/chromeos/display_snapshot.cc',
         'types/chromeos/display_snapshot.h',
         'types/chromeos/native_display_delegate.h',
         'types/chromeos/native_display_observer.h',
         'types/chromeos/touchscreen_device.cc',
         'types/chromeos/touchscreen_device.h',
         'types/chromeos/touchscreen_device_manager.h',
         'types/display_constants.h',
         'types/display_types_export.h',
       ],
     },
     {
+      # GN version: //ui/display
       'target_name': 'display',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../ui/gfx/gfx.gyp:gfx',
         '../../ui/gfx/gfx.gyp:gfx_geometry',
         'display_util',
       ],
       'defines': [
         'DISPLAY_IMPLEMENTATION',
       ],
       'sources': [
+        # Note: file list duplicated in GN build.
         'chromeos/display_configurator.cc',
         'chromeos/display_configurator.h',
         'chromeos/touchscreen_delegate_impl.cc',
         'chromeos/touchscreen_delegate_impl.h',
         'chromeos/ozone/display_configurator_ozone.cc',
         'chromeos/x11/display_configurator_x11.cc',
         'chromeos/x11/display_mode_x11.cc',
         'chromeos/x11/display_mode_x11.h',
         'chromeos/x11/display_snapshot_x11.cc',
         'chromeos/x11/display_snapshot_x11.h',
@@ skipping 25 matching lines @@
           ],
         }],
         ['use_ozone == 1', {
           'dependencies': [
             '../../ui/ozone/ozone.gyp:ozone',
           ],
         }],
       ],
     },
     {
+      # GN version: //ui/display/util
       'target_name': 'display_util',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../ui/gfx/gfx.gyp:gfx_geometry',
       ],
       'defines': [
         'DISPLAY_UTIL_IMPLEMENTATION',
       ],
       'sources': [
+        # Note: file list shared with GN build.
         'util/display_util.cc',
         'util/display_util.h',
         'util/display_util_export.h',
         'util/edid_parser.cc',
         'util/edid_parser.h',
         'util/x11/edid_parser_x11.cc',
         'util/x11/edid_parser_x11.h',
       ],
       'conditions': [
         ['use_x11 == 1', {
           'dependencies': [
             '../../build/linux/system.gyp:xrandr',
             '../../ui/gfx/x/gfx_x11.gyp:gfx_x11',
           ],
         }],
         ['chromeos == 1', {
           'dependencies': [
             'display_types',
           ],
         }],
       ],
     },
     {
+      # GN version: //ui/display:test_util
       'target_name': 'display_test_util',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../ui/gfx/gfx.gyp:gfx',
         '../../ui/gfx/gfx.gyp:gfx_geometry',
       ],
       'defines': [
         'DISPLAY_IMPLEMENTATION',
       ],
       'sources': [
+        # Note: file list duplicated in GN build.
         'chromeos/test/test_display_snapshot.cc',
         'chromeos/test/test_display_snapshot.h',
       ],
       'conditions': [
         ['chromeos == 1', {
           'dependencies': [
             'display_types',
           ],
         }],
       ],
     },
     {
+      # GN version: //ui/display:display_unittests
       'target_name': 'display_unittests',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:run_all_unittests',
         '../../testing/gtest.gyp:gtest',
         '../../ui/gfx/gfx.gyp:gfx_geometry',
         'display_util',
       ],
       'include_dirs': [
         '../..',
@@ skipping 11 matching lines @@
           'dependencies': [
             'display',
             'display_test_util',
             'display_types',
           ],
         }],
       ],
     },
   ],
 }